Cobalt sulfide @ CNT-CNF for high-performance asymmetric supercapacitor

A cobalt sulfide encapsulated within carbon nanotube-carbon nanofiber (Co 9 S 8 @CNT-CNF) nanohybrid electrode is designed and prepared. The physicochemical characterization such as X-ray diffraction (XRD) and electron microscopy revealed the formation of Co 9 S 8 @CNT-CNF. The specific capacitance...

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Bibliographic Details
Published in:Ionics 2019-08, Vol.25 (8), p.4031-4035
Main Authors: Zhou, Yongsheng, Jin, Jiang, Zhou, Xuanren, Liu, Fang, Zhou, Ping, Zhu, Yingchun, Xu, Bingshe
Format: Article
Language:English
Subjects:
Carbon fibers
Carbon nanotubes
Chemistry
Chemistry and Materials Science
Cobalt sulfide
Condensed Matter Physics
Electrochemical analysis
Electrochemistry
Electrodes
Energy Storage
Flux density
Maximum power density
Nanofibers
Optical and Electronic Materials
Renewable and Green Energy
Short Communication
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Summary:A cobalt sulfide encapsulated within carbon nanotube-carbon nanofiber (Co 9 S 8 @CNT-CNF) nanohybrid electrode is designed and prepared. The physicochemical characterization such as X-ray diffraction (XRD) and electron microscopy revealed the formation of Co 9 S 8 @CNT-CNF. The specific capacitance of Co 9 S 8 @CNT-CNF is 1656 F g −1 at 1 A g −1 with good electrochemical cycle stability (92.6% up to 10,000 cycles). The Co 9 S 8 @CNT-CNF electrode exhibits a maximum power density of 8.83 kW kg −1 with an energy density of 65 Wh kg −1 , while a maximum energy density of 175 Wh kg −1 is attained at a power density of 463 W kg −1 . This impressive electrochemical performance of the Co 9 S 8 @CNT-CNF composite indicated significant potential for application in high-power and energy-storage devices.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-019-03085-3